Pospisil, Nestor bounced at U.S. Open

Vasek Pospisil (L) and Daniel Nestor of Canada congratulate Mike (L) and Bob Bryan of the U.S. after the Bryan brothers won their doubles match at the U.S. Open tennis championships in New York September 1, 2013. (REUTERS)

The Bryans dropped the first set but turned things around by breaking Nestor four time in a row.

"Obviously he struggled with (his serve) at the end," Bob Bryan said of Nestor's serving problems. "It might have been because we switched sides his patterns just kind of went away. The comfortable serves to both of us that he's -- we have played him 52, 53 times, so I guess he couldn't really visualize where to serve, so he started throwing in some doubles. I mean, that was the bottom line.

"I mean, we broke him four times in a row, and at the beginning he seemed pretty unbreakable. That's the reason we changed it up, because it wasn't feeling good."

Nestor and Pospisil held an 11-4 edge in aces but had eight double faults and 15 unforced errors, compared to just three by the Bryans, who are trying to become the first doubles team to capture all four grand slams in a year since Australia's Ken McGregor and Frank Sedgman did it in 1951.